Refinement of the convex shape model and tumbling spin state of (99942) Apophis using the 2020-2021 apparition data

被引：6

作者：

Lee, H-J ^{[1
]}

Kim, M-J ^{[1
]}

Marciniak, A. ^{[2
]}

Kim, D-H ^{[1
,3
]}

Moon, H-K ^{[1
]}

Choi, Y-J ^{[1
,4
]}

Zola, S. ^{[5
]}

Chatelain, J. ^{[7
]}

Lister, T. A. ^{[7
]}

Gomez, E. ^{[8
]}

Greenstreet, S. ^{[9
,10
,11
]}

Pal, A. ^{[12
]}

Szakats, R. ^{[12
]}

Erasmus, N. ^{[13
]}

Lees, R. ^{[14
]}

van Rensburg, P. Janse ^{[13
,14
]}

Ogloza, W. ^{[6
]}

Drozdz, M. ^{[6
]}

Zejmo, M. ^{[15
]}

Kaminski, K. ^{[2
]}

Kaminska, M. K. ^{[2
]}

Duffard, R. ^{[16
]}

Roh, D-G ^{[1
]}

Yim, H-S ^{[1
]}

Kim, T. ^{[17
]}

Mottola, S. ^{[18
]}

Yoshida, F. ^{[19
,20
]}

Reichart, D. E. ^{[21
]}

Sonbas, E. ^{[22
,26
]}

Caton, D. B. ^{[23
]}

Kaplan, M. ^{[24
]}

Erece, O. ^{[24
,25
]}

Yang, H. ^{[1
]}

机构：

[1] Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea

[2] Adam Mickiewicz Univ, Astron Observ Inst, Fac Phys, Sloneczna 36, PL-60286 Poznan, Poland

[3] Chungbuk Natl Univ, 1 Chungdae Ro, Cheongju 28644, Chungbuk, South Korea

[4] Univ Sci & Technol, 217 Gajeong Ro, Daejeon 34113, South Korea

[5] Jagiellonian Univ, Astron Observ, Ul Orla 171, PL-30244 Krakow, Poland

[6] Pedag Univ, Mt Suhora Observ, Ul Pochorazych 2, PL-30084 Krakow, Poland

[7] Las Cumbres Observ, 6740 Cortona Dr Suite 102, Goleta, CA 93117 USA

[8] Cardiff Univ, Las Cumbres Observ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, Wales

[9] Asteroid Inst, 20 Sunnyside Ave,Suite 427, Mill Valley, CA 94941 USA

[10] Univ Washington, Dept Astron, 3910 15th Ave NE, Seattle, WA 98195 USA

[11] Univ Washington, DIRAC Inst, 3910 15th Ave NE, Seattle, WA 98195 USA

[12] Eotvos Lorand Res Network ELKH, Konkoly Observ, Res Ctr Astron & Earth Sci, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary

[13] South African Astron Observ, ZA-7925 Cape Town, South Africa

[14] Univ Cape Town, Dept Astron, ZA-7701 Rondebosch, South Africa

[15] Univ Zielona Gora, Kepler Inst Astron, Lubuska 2, PL-65265 Zielona Gora, Poland

[16] CSIC, Dept Sistema Solar, Inst Astrofis Andalucia, Glorieta La Astron S-N, Granada 18008, Spain

[17] Natl Youth Space Ctr, Goheung 59567, Jeollanam Do, South Korea

[18] Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetary Res, D-12489 Berlin, Germany

[19] Univ Occupat & Environm Hlth, 1-1 Iseigaoka, Yahata, Kitakyusyu 8078555, Japan

[20] Chiba Inst Technol, Planetary Explorat Res Ctr, 2-17-1 Tsudanuma, Narashino, Chiba 2750016, Japan

[21] Univ N Carolina, Chapel Hill, NC 27599 USA

[22] Adiyaman Univ, Dept Phys, TR-02040 Adiyaman, Turkey

[23] Appalachian State Univ, Dark Sky Observ, Dept Phys & Astron, Boone, NC 28608 USA

[24] Akdeniz Univ, Dept Space Sci & Technol, TR-07058 Antalya, Turkey

[25] TUBITAK Natl Observ, Akdeniz Univ Campus, TR-07058 Antalya, Turkey

[26] Adiyaman Univ, Astrophys Applicat & Res Ctr, TR-02040 Adiyaman, Turkey

来源：

ASTRONOMY & ASTROPHYSICS | 2022年 / 661卷

关键词：

minor planets; asteroids; individual; (99942) Apophis; techniques; photometric; ASTEROID LIGHTCURVE INVERSION; 2029 CLOSE ENCOUNTER; OPTIMIZATION METHODS; SURFACE; EARTH;

D O I：

10.1051/0004-6361/202243442

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The close approach of the near-Earth asteroid (99942) Apophis to Earth in 2029 will provide a unique opportunity to examine how the physical properties of the asteroid could be changed due to the Earth's gravitational perturbation. As a result, the Republic of Korea is planning a rendezvous mission to Apophis. Aims. Our aim was to use photometric data from the apparitions in 2020-2021 to refine the shape model and spin state of Apophis. Methods. Using thirty-six 1- to 2-meter-class ground-based telescopes and the Transiting Exoplanet Survey Satellite, we carried out a photometric observation campaign throughout the 2020-2021 apparition. The convex shape model and spin state were refined using the light-curve inversion method. Results. According to our best-fit model, Apophis is rotating in a short-axis mode with rotation and precession periods of 264.178 h and 27.38547 h, respectively. The angular momentum vector orientation of Apophis was found to be (275 degrees, -85 degrees) in the ecliptic coordinate system. The ratio of the dynamic moments of inertia of this asteroid was fitted to I-a : I-b : I-c = 0.64 : 0.97 : 1, which corresponds to an elongated prolate ellipsoid. These findings regarding the spin state and shape model can be used to both design the space mission scenario and investigate the impact of the Earth's tidal force during close encounters.

引用

页数：14

共 1 条

[1] Refinement of the convex shape model and tumbling spin state of (99942) Apophis using the 2020-2021 apparition data
Lee, H.-J.
Kim, M.-J.
Marciniak, A.
Kim, D.-H.
Moon, H.-K.
Choi, Y.-J.
Zola, S.
Chatelain, J.
Lister, T.A.
Gomez, E.
Greenstreet, S.
Pál, A.
Szakáts, R.
Erasmus, N.
Lees, R.
Janse Van Rensburg, P.
Ogloza, W.
Dróżdż, M.
Å»ejmo, M.
Kamianski, K.
Kamianska, M.K.
Duffard, R.
Roh, D.-G.
Yim, H.-S.
Kim, T.
Mottola, S.
Yoshida, F.
Reichart, D.E.
Sonbas, E.
Caton, D.B.
Kaplan, M.
Erece, O.
Yang, H.
[J]. Astronomy and Astrophysics, 2022, 661

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